TWI464518B - Light source device and projector - Google Patents

Description

Light source device and projector

Japanese Patent Application No. 2011-140478, filed on Jun. 24, 2011, is hereby incorporated by reference.

The present invention relates to a light source device and a projector.

Now, as a video projection device that projects a screen or video image of a personal computer, or even an image of a video material memorized by a memory card or the like, to a screen, a data projector is often used. This projector condenses the light emitted from the light source onto a micromirror display element called a DMD (Digital Micromirror Device) or a liquid crystal panel, and then displays the color image on the screen.

In such projectors, conventionally, high-intensity discharge bulbs have been mainstreamed as light sources, but in recent years, many types of projectors have been developed, and those projectors are used as light sources, using light-emitting diodes or laser diodes, Or an organic electroluminescent element, a phosphor, or the like.

For example, a light source device is known which has a plurality of light-emitting elements arranged in an array on a plane; a collimator lens that condenses light emitted from each of the light-emitting elements; and holds those components Keep the body. In the light source device, it is necessary to perform optical axis adjustment with high precision for each of a plurality of collimator lenses.

For example, Japanese Laid-Open Patent Publication No. 2002-49326 describes a light source device using one lens array instead of a plurality of collimator lenses. The The light source device includes: a plurality of light-emitting elements dispersed on a plane; and a lens array corresponding to an optical element disposed by the light emitted from the light-emitting element; and light transmitted through the lens array is emitted perpendicularly to a plane.

However, in the light source device according to the above description, in the configuration in which the light source element such as the light-emitting element emits high-intensity light through the lens array, if the lens array is disposed in close proximity to the light-emitting element, the lens array also becomes high-temperature together with the light-emitting element. , and there may be a bad situation such as deformation.

Further, in a structure in which the periphery of the lens array is fixed to the array holder made of a metal material to improve heat dissipation, a light source device having a simple structure in which both end portions of the lens array are engaged with both end portions of the array holder is used. In the case where the lens array is deformed due to a high temperature state, the adhesion between the lens array and the array holder is lowered, and heat dissipation may be lowered.

The light source device of the present invention has the following configuration, and has a light source holder in which a plurality of light source elements are arranged in an array at a predetermined interval; and the lens array has: (a) a plate-like base (b) a plurality of lens portions respectively arranged in an array at a predetermined interval in accordance with the plurality of light source elements, and integrally formed with the plate-shaped base portion; and disposed on the light irradiation side of the light source element; The array holder is disposed between the light source holder and the lens array, and holds the lens array; the lens array has a plurality of first holes in which the first fixing screw member is inserted; The array holding system has a first screw hole portion to which the first fixing screw member is engaged at a position corresponding to the first hole portion of the lens array; and the first fixing screw member penetrates the lens array The one hole portion is engaged with the first screw hole portion of the array holder, and the lens array and the array holder are disposed in close contact with each other.

Further, the projector of the present invention has the following configuration, and includes a light source device, a display element that forms an optical image by light emitted from the light source device, and a projection side optical system that is to be used by the display element. The formed optical image is projected onto the screen; and the projector control means controls the light source device and the display element; the light source device is the light source device according to any one of claims 1 to 11.

The advantages of the present invention are set forth in the following description, and some may be apparent from the description or by the examples. The advantages of the present invention are obtained from the methods described below and combinations thereof.

Specific embodiments of the invention will be described by way of the drawings.

Hereinafter, embodiments of the present invention will be described. FIG. 1 is an external perspective view of the projector 10. Further, in the present embodiment, the left and right directions of the projector 10 are indicated in the left and right directions with respect to the projection direction, and the front and rear directions are shown in the front and rear directions with respect to the screen side direction of the projector 10 and the traveling direction of the light beam.

As shown in Fig. 1, the projector 10 has a substantially rectangular parallelepiped shape, and has a cover on the side of the front panel 12 which is the front side of the projector housing. The lens cover 19 of the shadow port is provided with a plurality of suction holes 18 or vent holes 17 provided in the front panel 12. Further, there is an Ir receiving unit that receives a control signal from the remote controller (not shown).

Further, the button/indicator portion 37 is provided on the upper panel 11 of the casing, and the button/indicator portion 37 is provided with a power-on key or a power indicator for notifying the power source to turn on or off, and a projection switch for switching the projection on or off. A button or indicator such as a key, a light source unit, or a display element or an overheat indicator that is notified when the control circuit is overheated.

Further, various terminals 20 such as an input/output connector unit and a power adapter plug for providing a USB terminal or a video signal input D-SUB terminal, an S terminal, and an RCA terminal are provided on the back surface of the casing. Further, a plurality of suction holes are formed in the back panel. Further, a plurality of exhaust holes 17 are formed in each of the right side panel of the side panel of the casing (not shown) and the left panel 15 of the side panel shown in FIG. Further, an intake hole 18 is also formed in a corner portion near the back panel of the left side panel 15.

Next, the projector control means of the projector 10 will be described using the block diagram of Fig. 2. The projector control means is composed of a control unit 38, an input/output interface 22, a video conversion unit 23, a display encoder 24, a display drive unit 26, and the like. The video signals of various specifications input from the input/output connector unit 21 are converted by the input/output interface 22 and the system bus (SB) so as to be unified into a video signal of a predetermined format suitable for display via the input/output interface (SB). Output to display encoder 24.

Further, the display encoder 24 develops and stores the input video signal in the video RAM 25, and generates a video signal from the memory content of the video RAM 25, and outputs the video signal to the display drive unit 26.

The display drive unit 26 functions as a display element control means, and drives the display element 51 of the spatial light modulation element (SOM) at an appropriate frame rate in accordance with the image signal output from the display encoder 24. Then, the projector 10 irradiates the light beam emitted from the light source unit 60 to the display element 51 via the light guiding optical system, and forms an optical image by the reflected light of the display element 51, and then passes through a projection side optical system to be described later. The image projection is displayed on a screen not shown. Further, the movable lens group 235 of the projection side optical system is driven by the lens motor 45 for zooming or focusing.

Further, the video compression/decompression unit 31 performs a recording process of compressing the luminance signal and the color difference signal of the video signal by processing such as ADCT and Huffman coding, and sequentially writing and disassembling it. The memory card 32 of the recording medium. Further, the video compression/decompression unit 31 reads the video data recorded by the memory card 32 in the playback mode, decompresses the video data constituting the series of motion images in a frame unit, and then performs the video conversion unit 23 via the video conversion unit 23. The image data is output to the display encoder 24, and based on the image data stored in the memory card 32, processing for displaying a dynamic image or the like is performed.

The control unit 38 controls the operation of each circuit in the projector 10, and is constituted by a CPU, a ROM that fixedly stores an operation program such as various settings, a RAM used as a working memory, and the like.

The operation signal of the button/indicator portion 37 formed by the main button and the indicator lamp provided on the upper panel 11 of the casing is directly sent to the control unit 38, and the button operation signal from the remote controller is received by the Ir receiving unit 35. After reception, the code signal demodulated by the Ir processing unit 36 is output to the control unit 38.

Further, the sound processing unit 47 is connected to the control unit 38 via the system bus bar (SB). The sound processing unit 47 includes a sound source circuit such as a PCM sound source, and compares the sound data in the projection mode and the playback mode, and drives the speaker 48 to expand the sound.

Further, the control unit 38 controls the light source control circuit 41 as a light source control means for individually controlling the excitation light of the light source unit 60 in order to emit light of a predetermined wavelength band required for generating an image from the light source unit 60. Illumination of the illumination device, the red light source device, and the blue light source device.

Further, the control unit 38 causes the cooling fan drive control circuit 43 to detect the temperature of the plurality of temperature sensors provided in the light source unit 60 or the like, and controls the number of rotations of the cooling fan from the result of the temperature detection. Moreover, the control unit 38 causes the cooling fan drive control circuit 43 to continue to rotate the cooling fan after the power of the projector body is turned off by a timer or the like, or to turn off the projector according to the temperature detection result of the temperature sensor. Control of the power supply of the main body, etc.

Next, the internal structure of the projector 10 will be described. 3 is a plan view showing the internal structure of the projector 10. As shown in FIG. 3, the projector 10 has a control circuit board 241 in the vicinity of the right side panel. The control circuit substrate 241 has a power supply circuit block or a light source circuit block or the like. Further, the projector 10 has a light source unit 60 on the side of the control circuit board 241, that is, at a substantially central portion of the projector housing. Further, the projector 10 has an optical system unit 160 between the light source unit 60 and the left side panel 15.

The light source unit 60 includes an excitation light irradiation device 70 which is disposed at a central portion of the projector housing in the left-right direction and is disposed on the rear panel 13 In the vicinity, the fluorescent light emitting device 100 is disposed on the optical axis of the light beam emitted from the excitation light irradiation device 70 and disposed in the vicinity of the front panel 12; the blue light source device 300 is configured to be and from the fluorescent light emitting device. The light beams emitted from 100 are arranged in the vicinity of the front panel 12 in parallel; the red light source device 120 is disposed between the excitation light irradiation device 70 and the fluorescent light emitting device 100; and the light guiding optical system 140 is derived from the fluorescent light. The light emitted from the light-emitting device 100, the light emitted from the red light source device 120, and the light emitted from the blue light source device 300 are converted to the same optical axis, and the light of each color is guided to the light tunnel 175 of a predetermined side. Incident port.

The excitation light irradiation device 70 includes a plurality of excitation light sources 71 as light source elements arranged such that the back surface panel 13 is orthogonal to the optical axis, and a condensing lens 78 for condensing the emitted light from the excitation light source 71; 81 is disposed between the excitation light source 71 and the back panel 13. In the excitation light irradiation device 70 of the present embodiment, a plurality of excitation light sources 71 that illuminate light of a predetermined wavelength band are arranged in an array to form a surface light source body.

In detail, in the excitation light source 71 of the light source device, a total of 24 blue laser diodes in three rows and eight rows are arranged in an array, and on the optical axis of each blue laser diode, the arrangement will come from The light emitted from the blue laser diode is converted into a lens array 73 of a collimating lens of parallel light. The lens array 73 of the present embodiment has a plurality of lens portions that are formed in a convex shape, and emits light that is emitted from each of the excitation light sources 71 as the light source elements so as to be incident on the condensing lens 78.

The cooling fan 261 is disposed in the vicinity of the radiator 81, and the cooling fan 261 and the radiator 81 cool the excitation light source 71.

The fluorescent light emitting device 100 has a fluorescent wheel 101 as a fluorescent plate disposed in parallel with the front surface plate 12, that is, orthogonal to the optical axis of the light beam emitted from the excitation light irradiation device 70 via the concave lens 76; the wheel motor 110, The fluorescent wheel 101 is rotationally driven; and the collecting lens group 111 condenses a light beam emitted from the fluorescent wheel 101 in the direction of the back panel 13. The condensing lens group 111 has a large-diameter convex lens 112 and a small-diameter convex lens 113, and is linearly arranged such that the respective optical axes coincide with the optical axis of the condensing lens 78.

The fluorescent wheel 101 is a disk-shaped metal substrate and is used as a fluorescent plate which forms a fluorescent light which emits fluorescent light of a green wavelength band by emitting light emitted from the excitation light source 71 as an excitation light in a concave portion. The area is illuminated by the excitation light. Further, the surface of the fluorescent lamp 101 including the fluorescent light-emitting region on the side of the excitation light source 71 is mirror-processed by vapor deposition of silver or the like, thereby being formed on the reflecting surface of the reflected light and abutting against the reflecting surface. Lay the layer of green phosphor.

Then, the light irradiated from the excitation light source 71 to the green phosphor layer of the fluorescent wheel 101 via the lens array 73, the collecting lens 78, the concave lens 76, and the first dichroic mirror 141 excites the green phosphor in the green phosphor layer, and The light beam that emits fluorescence in all directions from the green phosphor is directly emitted toward the excitation light source 71 side, or is reflected by the reflection surface of the fluorescent wheel 101, and is emitted toward the excitation light source 71 side. Further, the phosphor is not absorbed by the phosphor of the phosphor layer, and the excitation light that has passed through the phosphor layer and is irradiated onto the metal substrate is reflected by the reflecting surface and then incident on the phosphor layer to excite the phosphor. Therefore, by using the surface of the concave portion of the fluorescent wheel 101 as a reflecting surface, the utilization efficiency of the excitation light emitted from the excitation light source 71 can be improved, and the light can be emitted more brightly. The concave The mirror 76 converts the excitation light from the excitation light source 71 into substantially parallel light.

Further, the excitation light reflected on the phosphor layer on the reflecting surface of the fluorescent wheel 101 is not absorbed by the phosphor of the phosphor layer, but is emitted to the excitation light on the excitation light source 71 side, and transmits the first color separation described later. In the mirror 141, since the fluorescent light is reflected by the first dichroic mirror 141, the excitation light is not emitted to the outside. Further, the cooling fan 261 is disposed between the wheel motor 110 and the front panel 12, and the cooling fan 261 cools the fluorescent wheel 101.

The red light source 121 is disposed such that the excitation light source 71 is orthogonal to the optical axis, and the condensing lens group 125 condenses the emitted light from the red light source 121. Further, the red light source device 120 is disposed such that the optical axis intersects with the emitted light from the excitation light irradiation device 70 and the green wavelength band light of the light beam emitted from the fluorescent wheel 101. Further, the red light source 121 is a red light emitting diode which is a semiconductor light emitting element that emits red wavelength band light. Further, the red light source device 120 has a heat sink 130 disposed on the right side panel 14 side of the red light source 121. Further, the cooling fan 261 is disposed between the heat sink 130 and the front panel 12, and the red light source 121 is cooled by the cooling fan 261.

The blue light source device 300 includes a blue light source 301 that is disposed in parallel with an optical axis of the light emitted from the fluorescent light emitting device 100, and a collecting lens group 305 that collects the emitted light from the blue light source 301. Further, the blue light source device 300 is disposed such that the optical axis intersects with the emitted light from the red light source device 120. Further, the blue light source 301 is a blue light emitting diode which is a semiconductor light emitting element that emits blue wavelength band light. Further, the blue light source device 300 has a heat sink 310 disposed on the front panel 12 side of the blue light source 301. Moreover, the cooling fan 261 is disposed on the heat sink 310 and is positive The blue light source 301 is cooled by the cooling fan 261 between the face panels 12.

Further, the light guiding optical system 140 is composed of a collecting lens that condenses light beams of red, green, and blue wavelength bands, or a dichroic mirror that converts optical axes of light beams of different color wavelength bands into the same optical axis. Specifically, the first dichroic mirror 141 is disposed on the optical axis of the blue wavelength band light emitted from the excitation light irradiation device 70 and the green wavelength band light emitted from the fluorescent wheel 101, and is emitted from the red light source device 120. The position where the optical axis of the red wavelength band light intersects, the first dichroic mirror 141 transmits blue and red wavelength band light, and reflects the green wavelength band light, and converts the optical axis of the green light by 90 degrees. Left panel 15 direction.

Further, the second dichroic mirror 148 is disposed at a position where the optical axis of the blue wavelength band light emitted from the blue light source device 300 intersects with the optical axis of the red wavelength band light emitted from the red light source device 120. The dichroic mirror 148 transmits blue wavelength band light and reflects the green and red wavelength band light, and converts the optical axes of the green and red lights by 90 degrees into the back panel 13 direction. Further, the condensing lens 77 is disposed between the first dichroic mirror 141 and the second dichroic mirror 148. Further, a collecting lens 173 that condenses the light source light at the entrance of the light tunnel 175 is disposed in the vicinity of the light tunnel 175.

The optical unit 160 is formed in a substantially U shape by three squares, and the three blocks are located on the illumination side block 161 on the left side of the excitation light irradiation device 70, and the image generation in the vicinity of the position where the back panel 13 and the left side panel 15 intersect. Block 165, and a projection side block 168 between the light guiding optical system 140 and the left side panel 15.

The illumination side block 161 has a part of the light source side optical system 170, and the light source side optical system 170 is a light source emitted from the light source unit 60. The light is directed to the display element 51 of the image generation block 165. The light source side optical system 170 included in the illumination side block 161 includes a light tunnel 175 that causes a light beam emitted from the light source unit 60 to have a uniform intensity distribution, and a condensing lens that condenses a light beam emitted from the light tunnel 175. 178. The optical axis of the light beam emitted from the light tunnel 175 is converted into an optical axis conversion mirror 181 in the direction of the image generation block 165.

The image generation block 165 includes, as the light source side optical system 170, a condensing lens 183 that condenses the light source light reflected by the optical axis conversion mirror 181 on the display element 51, and an illuminating mirror 185 that transmits the condensed light. The light beam of the lens 183 is irradiated to the display element 51 at a predetermined angle. Further, the image generation block 165 has a DMD as the display element 51, and a heat sink 190 for cooling the display element 51 is disposed between the display element 51 and the back panel 13, and the display element 51 is cooled by the heat sink 190. Further, the condensing lens 195 as the projection side optical system 220 is disposed in the vicinity of the front surface of the display element 51.

The projection side block 168 has a lens group that projects the on-light reflected by the display element 51 onto the projection side optical system 220 of the screen. As the projection side optical system 220, a zoom lens having a zoom function having a fixed lens group 225 built in a fixed lens barrel and a movable lens group 235 built in the movable lens barrel is used. The lens motor moves the movable lens group 235, whereby zooming or focusing can be performed.

Next, the excitation light irradiation device 70 of the light source device of the projector 10 will be described. Fig. 4 is a perspective view showing an excitation light irradiation device 70 according to an embodiment of the present invention. Fig. 5 is an exploded perspective view showing the excitation light irradiation device 70 shown in Fig. 4. Fig. 6 is a front view of the excitation light irradiation device 70. Fig. 7 is an explanatory view showing an arrangement area of screws in the excitation light irradiation device 70. Fig. 8 is a perspective view of the lens array 73 of the excitation light irradiation device 70. Fig. 9 is a cross-sectional view taken along line I-I of the position of the light source element in the excitation light irradiation device 70 shown in Fig. 6. Fig. 10 is a partially enlarged view showing a cross section taken along line II-II of the screw position in the light source device shown in Fig. 6.

First, the outline of the excitation light irradiation device 70 will be described. The excitation light irradiation device 70 includes a lens array 73, an array holder 79, a light source holder 80, a heat sink 81, a pressure plate 89, a lens fixing screw 82 that is a first fixing screw member, and a jig fixing screw 87 that is a second fixing screw member. Wait.

The excitation light irradiation device 70 has a structure in which the pressure plate 89, the lens array 73, the array holder 79, and the light source holder 80 are sequentially disposed from the front to the rear, and the members are locked by the fixing screws 82 and 87.

Specifically, the lens fixing screw 82 is inserted into a lens fixing screw hole 89c as a second hole portion of the pressure plate 89, a lens fixing screw hole 73m as a first hole portion of the lens array 73, and a lens fixing screw 82 as will be described later. After the screw hole 79c for the lens fixing screw of the first screw hole portion of the array holding body 79, the pressure plate 89, the lens array 73, and the array holding body 79 are locked (see Fig. 10).

The jig fixing screw 87 is inserted into the jig fixing screw hole 79k which is the fourth hole portion of the array holding body 79 and the screw hole 80g which is the jig fixing screw of the second screw hole portion of the light source holder 80, as will be described later. The array holder 79 is locked to the light source holder 80 (refer to Fig. 10). Further, in front of the jig fixing screw hole 79k of the array holding body 79, a jig fixing screw hole 89b as a fifth hole portion of the pressing plate 89 is formed, and The jig fixing screw hole 73f of the third hole portion of the mirror array 73 is configured to be adjustable with the jig fixing screw 87.

Next, each constituent element of the excitation light irradiation device 70 will be described in detail. The excitation light irradiation device 70 has an array holder 79 having a substantially rectangular parallelepiped shape and a light source holder 80 as shown in FIGS. 4 and 5, and has an excitation light source 71 held between the array holder 79 and the light source holder 80. The structure of the laser diode or the light emitting diode (LED) of the light source element.

The light source holder 80 has a plate-like body portion 80a and a protruding portion 80b, and its cross-sectional shape forms an L-shape. The laser diodes of the plurality of light source elements as the excitation light source 71 are arranged in an array in the plate-like main body portion 80a. The heat sink 81 that dissipates the heat of the light source holder 80 is attached to the rear of the light source holder 80 by the heat sink fixing screw 83. A flexible substrate (not shown) electrically connected to the excitation light source 71 is provided on the bottom surface side of the excitation light irradiation device 70.

A lens array 73 as an optical element that condenses light emitted from the excitation light source 71 is provided on the front side of the light source holder 80. In the lens array 73, a plurality of convex lens portions 73e are formed at positions corresponding to respective ones of the plurality of excitation light sources 71.

The array holding body 79 that holds the lens array 73 is disposed between the lens array 73 and the light source holder 80. The array holding body 79 is made of a metal material having high heat dissipation properties, and is formed in a substantially rectangular plate shape, and has a substantially rectangular mounting recess 79b in which a lens array 73 is attached at a central portion of the front side surface. Further, in the present embodiment, the heat transmitted to the array holding body 79 is radiated from the surface of the side surface of the array holding body 79 or the like into the air. Further, in the mounting recess 79b of the array holding body 79, the matrix of the light transmitting holes 79a The shape is formed at a position corresponding to an optical path of each of the plurality of excitation light sources 71 that emit light.

The platen 89 is disposed on the front side of the array holding body 79 and the lens array 73, and the platen 89 presses the lens array 73 to the side of the array holding body 79. The platen 89 is attached to the plate-like main body portion 89f, and the lens hole 89a of the hole portion for irradiating a plurality of large-diameter lights is formed at a position corresponding to each of the convex lens portions 73e of the lens array 73. Further, the pressure plate 89 has a plurality of lens fixing screw holes 89c having a small diameter, and a lens fixing screw 82 inserted into the first fixing screw member; and a plurality of large-diameter jig fixing screw holes 89b are inserted into the second Fix the screw set 87 of the screw member.

Next, the arrangement structure of the screws 87 and 82 of the excitation light irradiation device 70 will be described with reference to FIGS. 6 and 7. As described above, the pressure plate 89 is disposed at a position where the lens portions 73e of the lens array 73 are disposed in the lens holes 89a of the holes for light irradiation.

With reference to Fig. 7, in the excitation light irradiation device 70 of the present embodiment, the regions A and B located between the respective rows of the lens portions 73e arranged in the three rows are sequentially spaced from the left to the right. The jig fixing screw 87, the jig fixing screw 87, the lens fixing screw 82, the jig fixing screw 87, the lens fixing screw 82, the jig fixing screw 87, and the jig fixing screw 87 are disposed. Further, the lens fixing screw 82 is disposed at a predetermined interval in the vicinity of the edge of the region where the pressure plate 89 is provided and at both ends of the jig fixing screw 87. Then, the jig fixing screw hole 89b and the lens fixing screw hole 89c are respectively formed in the pressing plate 89 so as to correspond to the jig fixing screws 87 and the lens fixing screws 82. In other words, in the excitation light irradiation device 70 of the present embodiment, a plurality of lens fixing screws 82 are disposed in the center portion. In the vicinity of the corner and the corner, a plurality of jig fixing screws 87 are disposed in a wide area in the plane.

In the excitation light irradiation device 70 of the present embodiment, each of the hole portions for the fixing screws is formed in each of the lens arrays 73 and the array holders 79 so that the plurality of the jig fixing screws 87 and the lens fixing screws 82 are arranged in this manner. The light source holder 80 and the clamp fixing screw 87 and the lens fixing screw 82 lock the pressure plate 89, the lens array 73, the array holding body 79, and the light source holder 80 into a single body.

Further, in the excitation light irradiation device 70 of the present embodiment, the hole 80p is formed in the vicinity of each corner portion of the plate-like main body portion 80a of the light source holder 80, and the heat sink fixing screw 83 is inserted into the hole 80p, and the heat sink is attached. 81 is constructed to be locked with the light source holder 80.

Next, the lens array 73 will be described in detail with reference to Fig. 8. The lens array 73 has a plate-like base portion 73a and a plurality of lens portions 73e which are formed in a convex shape. As a material for forming the lens array 73, a material having transparency, for example, an optical glass such as white glass or quartz glass, or an acrylic, polyester, styrene, epoxy resin, polycarbonate, or benzene can be used. A resin such as an ethylene-based or chlorinated ethylene-based resin. The lens array 73 of the present embodiment is formed by molding a resin material using a molding resin material.

The plate-like base portion 73a is formed into a substantially rectangular plate body, and the convex lens portion 73e is integrally formed on the front flat surface 73c. A flat surface 73d (see FIG. 9) that faces the array holding body 79 and abuts against the array holding body 79 is formed on the rear side.

The plurality of lens portions 73e are flat on the front side of the plate-like base portion 73a The surface 73c is aligned with the position of the light source element of the excitation light source 71 in a region in which the peripheral portion of the plate-like base portion 73a is located only inside the predetermined size, and is arranged in a matrix at a predetermined interval. In the present embodiment, a total of 24 lens portions 73e of three rows and eight rows are formed.

Further, the lens array 73 is formed of a screw hole in the plate-like base portion 73a. As the screw hole, a plurality of lens fixing screw holes 73m into which the lens fixing screw 82 is inserted and a plurality of jig fixing screw holes 73f into which the jig fixing screw 87 is inserted are formed. In detail, the jig fixing screw hole 73f or the lens fixing screw hole 73m is formed in the center portion of the region formed by the four lens portions 73e.

The jig fixing screw hole 73f formed in the lens array 73 is a large-diameter hole into which the jig fixing screw 87 of the second fixing screw member is inserted, and is formed to have a diameter slightly larger than the head of the jig fixing screw 87. The jig fixing screw hole 73f is formed such that the opening diameter on the front side is larger than the opening diameter on the rear side, and the inclined surface portion 73g is formed on the inner side surface.

The lens fixing screw hole 73m as the first hole portion is a small-diameter hole into which the lens fixing screw 82 of the first fixing screw member is inserted, and is formed to have a diameter slightly larger than the main body portion 82a of the lens fixing screw 82, and It is smaller than the diameter of the jig fixing screw hole 73f. The lens fixing screw hole 73m is formed such that the opening diameter on the front side is larger than the opening diameter on the rear side, and the inclined surface portion 73n is formed on the inner side surface.

Next, each constituent element of the excitation light irradiation device 70 will be described in detail with reference to the cross-sectional view of Fig. 9. The excitation light source 71 has a disk-shaped pedestal 71a on which a light-emitting portion is placed, and a cylindrical-shaped cover portion 71b that houses the light-emitting portion and forms light for emitting the light-emitting portion forward The opening portion; the lead terminal portion 71c electrically connected to the light emitting portion is provided on the base 71a.

The light source holder 80 is formed of a heat dissipating member made of a metal material or an alloy material such as aluminum or copper. The flat surface 80e facing the array holding body 79 is formed on the front surface of the plate-like main body portion 80a, and a plurality of mounting recesses 80c and through holes 80m are formed in the flat surface 80e at predetermined intervals, and the excitation light source 71 is attached to each of the mounting recesses 80c.

The susceptor 71a is formed of a metal material having good thermal conductivity such as aluminum. And has the effect of dissipating heat from the light-emitting portion. Further, the susceptor 71a is formed to have a larger diameter than the lid portion 71b, and the flat surface on the side of the light source holder 80 is disposed in the light source holder 80 so as to be in close contact with the attachment recess 80c of the light source holder 80. The flat surface is formed on the front side of the outer peripheral portion of the susceptor 71a, and is configured to press the front side flat surface to the light source holder 80 side by the peripheral portion of the light transmission hole 79a of the array holding body 79.

The terminal portion (not shown) is attached to the lead terminal portion 71c of the excitation light source 71 disposed in the mounting recess 80c, and is electrically connected to the flexible substrate via the terminal portion, and the flexible substrate is connected to the light source control circuit 41 or the control unit 38. Electrical connection.

The array holder 79 having a substantially rectangular plate shape is disposed on the front side of the light source holder 80. The flat surface 79g is formed on the end surface on the rear side of the array holding body 79, and is disposed in close contact with the flat surface 80e of the light source holder 80. The mounting recess 79b on which the lens array 73 is mounted is formed on the front side of the array holding body 79. The flat surface 73d on the rear side of the plate-like base portion 73a of the lens array 73 is disposed in close contact with the flat surface of the mounting recess portion 79b. Further, as the light emitted from the excitation light source 71 to the respective lens portions 73e of the lens array 73 The optical path is formed in a plurality of light transmission holes 79a on the flat surface of the mounting recess 79b.

As described above, the plurality of lens portions 73e are formed on the front side of the plate-like base portion 73a of the lens array 73 attached to the mounting recess portion 79b, and are formed to slightly protrude from the lens hole 89a of the light-irradiating hole portion of the pressure plate 89. The flat surface 73c on the front side of the lens array 73 is configured to be in close contact with the flat surface on the rear side of the plate-like main body portion 89f of the pressure plate 89.

Next, the locking structure of the respective excitation screws 82, 87 of the excitation light irradiation device 70 will be described with reference to Fig. 10. As shown in FIG. 10, the lens holding body 79 is formed at a position corresponding to the lens fixing screw hole 73m of the lens array 73 in the screw holder hole 79c as described above, and is configured as a lens fixing screw 82. The external thread of the main body portion 82a is screwed to the lens fixing screw with a screw hole 79c.

In the plate-like main body portion 89f of the pressure plate 89, a main body portion 82a of the lens fixing screw 82 is formed to penetrate, and a lens fixing screw hole 89c having a smaller diameter than the head portion 82b of the lens fixing screw 82 is formed. Therefore, the head portion 82b of the lens fixing screw 82 is locked to the lens fixing screw hole 89c of the pressure plate 89, and the main body portion 82a of the lens fixing screw 82 is engaged with the lens fixing screw screw hole 79c of the array holding body 79.

In the present embodiment, the lens fixing screw hole 89c of the pressure plate 89 is formed to have a smaller diameter than the opening diameter of the lens fixing hole 73m of the lens array 73, and the lens fixing screw hole 89c of the pressure plate 89 is used. The peripheral portion has elasticity.

Specifically, the head portion 82b of the lens fixing screw 82 pushes the peripheral portion of the lens fixing screw hole 89c of the pressure plate 89 to the array holding body. On the side of the 79 side, the flat surface 73c on the front side of the lens array 73 is pressed against the array holding body 79 side by the surface on the rear side of the plate-like main body portion 89f of the press plate 89. At this time, when the lens fixing screw 82 is locked with a predetermined force, the head portion 82b of the lens fixing screw 82 pushes the peripheral portion of the lens fixing screw hole 89c to the side of the array holding body 79, because the lens fixing screw By bending the peripheral portion of the hole 89c, it is possible to reduce stress locally on only the periphery of the lens fixing screw hole 73m of the lens array 73, and it is possible to prevent the lens array 73 from being damaged.

In the device of the comparative example, the lens fixing screw hole 89c of the pressure plate 89 and the lens fixing screw hole 73m of the lens array 73 have the same diameter. For example, when the lens fixing screw 82 is locked with a predetermined force, A large stress is locally generated in the periphery of the lens fixing screw hole 73m, and there is a case where the lens array 73 is damaged. Since the excitation light irradiation device 70 of the present invention has the above configuration, the lens array 73 can be prevented from being damaged.

Further, as described above, the lens fixing screw hole 73m of the lens array 73 is formed such that the opening diameter on the rear side is smaller than the opening diameter on the front side, because the area of the flat surface 73d on the rear side is larger than the front side of the lens array 73. Since the flat surface 73c is larger, the heat dissipation from the lens array 73 to the array holding body 79 is high.

The array holding body 79 has a jig fixing screw hole 79k at a position corresponding to the jig fixing screw hole 73f of the lens array 73, the diameter of which is smaller than the head 87b of the jig fixing screw 87, and is formed to be the main body portion 87a. Roughly the same diameter. A screw hole 80g for a jig fixing screw as an internal thread is formed in the light source holder 80, and is configured as a fixing screw 87 with a jig. The external thread of the body portion 87a is screwed.

In the excitation light irradiation device 70 configured as described above, the main body portion 87a of the jig fixing screw 87 passes through the jig fixing screw hole 79k of the array holding body 79, and the screw hole 80g for the jig fixing screw of the light source holder 80. The head portion 87b of the jig fixing screw 87 is inserted through the jig fixing screw hole 89b of the pressure plate 89 and the jig fixing screw hole 73f of the lens array 73, and then locked to the jig fixing screw hole 79k of the array holding body 79. Therefore, the array holding body 79 and the light source holder 80 can be firmly locked by the jig fixing screw 87 in a close contact state.

However, when the temperature of the excitation light source 71 itself rises, the luminous efficiency of the excitation light source 71 decreases. Therefore, in order to dissipate heat from the excitation light source 71, the light source holder 80 is formed by a heat dissipating member. Further, in the present embodiment, since the array holding body 79 and the light source holder 80 can be firmly locked in the close contact state by the jig fixing screw 87 as described above, the heat transmitted to the excitation light source 71 of the light source holder 80 can be performed. Further, the array holder 79 having high heat dissipation property disposed on the front side of the light source holder 80 dissipates heat, and the temperature rise of the excitation light source 71 itself can be suppressed more than when the light source holder 80 dissipates heat.

Further, as described above, the lens array 73 is formed in the plate-like base portion 73a by the jig fixing screw hole 73f, and the pressure plate 89 is provided with the jig fixing screw hole 89b at a position corresponding to the jig fixing screw hole 73f. These jig fixing screw holes 73f and 89b are formed to have a larger diameter than the head portion 87b of the jig fixing screw 87, and can be used as an adjusting hole portion of the jig fixing screw 87.

In addition, a plurality of lens fixing screws 82 of the first fixing screw member The arrangement position of the jig fixing screws 87 of the second fixing screw member is not limited to the above-described configuration, and may be appropriately changed. For example, as shown in the first modification of FIG. 11A, the lens fixing screw 82 may be disposed at a position near the center portion and a position near the four corner portions.

Further, for example, as shown in the second modification of FIG. 11B, the region where the jig fixing screws 87 are disposed may be provided in the vicinity of the left and right end portions of the excitation light irradiation device 70, and may be along the side of the excitation light irradiation device 70. A plurality of jig fixing screws 87 are disposed in this region. In this way, the adhesion between the array holding body 79 and the light source holder 80 becomes higher, and the heat dissipation property of the light source holder 80 becomes higher.

As described above, according to the embodiment of the present invention, in the excitation light irradiation device 70 as the light source device, the lens array 73 is formed on the plate by a plurality of lens fixing screw holes 73m as the first hole portion. In the base portion 73a, the array holding body 79 has a screw hole 79c for a lens fixing screw as a first screw hole portion at a position corresponding to each lens fixing screw hole 73m, and penetrates the lens portion through the main body portion 82a of the lens fixing screw 82. The fixing screw hole 73m is screwed into the lens fixing screw hole 79c, and is disposed in a state in which the lens array 73 and the array holding body 79 are in close contact with each other. Therefore, the light source device of the excitation light irradiation device 70 and the projector 10 having the light source device can be provided, and the excitation light irradiation device 70 improves the adhesion between the lens array 73 and the array holder 79, and has high adhesion to the lens array 73. Heat dissipation.

Further, in detail, the flat surface 73d on the rear side of the plate-like base portion 73a of the lens array 73 and the flat surface on the front side of the mounting concave portion 79b of the array holding body 79 are disposed in close contact with each other, and The lens array 73 improves heat dissipation.

Further, according to the embodiment of the present invention, the pressing plate 89 disposed on the light irradiation side of the lens array 73 has a plate-like main body portion 89f, and the plurality of lens holes 89a are formed in the plate-shaped main body portion 89f corresponding to the plurality of The lens fixing screw hole 89c is formed in the plate-like main body portion 89f and penetrates the main body portion 82a of the lens fixing screw 82, and is formed as a second hole having a smaller diameter than the head portion 82b of the lens fixing screw 82. The lens fixing screw 82 penetrates the lens fixing screw hole 89c of the pressure plate 89 and the lens fixing screw hole 73m of the lens array 73, and is screwed into the lens fixing screw screw hole 79c of the array holding body 79. That is, the lens array 73 is pressed against the array holding body 79 side by the pressing plate 89, and the adhesion between the lens array 73 and the array holding body 79 is further improved, and the heat dissipation property to the lens array 73 becomes higher.

Further, according to the embodiment of the present invention, the plurality of lens fixing screw holes 73m of the lens array 73 are formed such that the opening diameter on the front side is larger than the lens fixing screw hole 89c of the pressure plate 89, and the lens fixing screw for the pressure plate 89 is used. The peripheral portion of the hole 89c functions as a spring having elasticity in the front-rear direction. By the head portion 82b of the lens fixing screw 82, the peripheral portion of the lens fixing screw hole 89c of the pressure plate 89 is pressed to the array holding body 79 side, and the lens array 73 is pressed by the plate-like main body portion 89f of the pressing plate 89. Plate-shaped base portion 73a. In this manner, the lens array 73 can be uniformly pressed in-plane to the array holding body 79 side by the pressing plate 89, and the adhesion between the lens array 73 and the array holding body 79 becomes higher, and also because the lens fixing screw of the pressing plate 89 is fixed. The peripheral portion of the hole 89c functions as a spring having elasticity along the front-rear direction, so that the lens array 73 can be prevented from being damaged.

Further, according to the embodiment of the present invention, the plurality of lens fixing screw holes 73m into which the lens fixing screws 82 of the lens array 73 are inserted are formed such that the opening diameter of the front side is larger than the opening diameter of the rear side, and the inclination is inclined. Since the face portion 73n is formed on the inner side surface of the lens fixing screw hole 73m, the area of the flat surface 73d on the rear side is larger than the area of the flat surface 73c on the front side of the lens array 73, and the adhesion between the lens array 73 and the array holding body 79 is improved. The heat dissipation from the lens array 73 to the array holder 79 can be improved.

Further, according to the embodiment of the present invention, the lens array 73 is formed in the plate-like base portion 73a by the jig fixing screw hole 73f as the third hole portion, and the array holding body 79 is attached to the jig fixing screw corresponding to the lens array 73. The position of the hole 73f has a jig fixing screw hole 79k as a fourth hole portion, and the light source holder 80 has a jig fixing screw hole 80g as a second screw hole portion, and the main body portion 87a of the jig fixing screw 87 is held through the array. After the jig fixing screw hole 79k of the body 79, the jig fixing screw hole 80g of the light source holder 80 is screwed. Therefore, the adhesion between the light source holder 80 and the array holder 79 is increased, and the heat dissipation from the array holder 79 to the light source holder 80 is increased.

Further, according to the embodiment of the present invention, the jig fixing screw hole 89b is formed in the pressing plate 89, and the jig fixing screw hole 73f is formed in the lens array 73. Therefore, each of the holes 89b and 73f can be used as an adjustment hole portion of the jig fixing screw 87. Further, since the holes 89b and 73f are formed, the heat dissipation property is increased.

Further, according to the embodiment of the present invention, since the lens array 73, the array holder 79, and the light source holder 80 have high adhesion, The distance between the light source element of the excitation light source 71 and the lens array 73 can be shortened, and the size of the lens portion 73e of the lens array 73 can be made small. In other words, since the lens portion 73e of the lens array 73 can be incident on the lens portion 73e of the lens array 73 at a stage where the light emitted from the excitation light source 71 is small, the lens array 73 can be miniaturized. That is, the excitation light irradiation device 70 can be miniaturized.

Further, according to the embodiment of the present invention, the plurality of lens fixing screws 82 are disposed in the vicinity of the center portion and the vicinity of the corner portion in the plane of the plate-like base portion 73a of the lens array 73, and the platen into which the lens fixing screw 82 is inserted is formed. Each of the lens fixing screw hole 89c of the 89, the lens fixing screw hole 73m of the lens array 73, and the lens fixing screw hole 79c of the array holding body 79. Therefore, the adhesion between the lens array 73 and the array holding body 79 becomes high, and the heat dissipation property can be improved for the lens array 73.

Further, according to the embodiment of the present invention, since the locking force of the array holding body 79 and the light source holding body 80 by the jig fixing screw 87 is comparable to that of the lens array 73 and the array holding body 79 by the lens fixing screw 82 Since the tightening force is stronger, the adhesion between the array holding body 79 and the light source holding body 80 becomes high, and the lens array 73 can be prevented from being damaged.

Further, according to the embodiment of the present invention, the jig fixing screw 87 is more than the lens fixing screw 82, and is preferably disposed in a wide range. By this means, the adhesion between the array holding body 79 and the light source holding body 80 becomes higher, and the array holding body 79 has high heat dissipation.

Further, according to the embodiment of the present invention, since the array holding body 79 is a member formed of a material having high thermal conductivity, the lens array 73 has high heat dissipation properties.

Further, according to the embodiment of the present invention, since the light source holder 80 has the heat sink 81 that is in contact with the light source holder 80 on the surface facing the surface of the excitation light source 71 that holds the light source element, the light source holder The 80 series has high heat dissipation.

Further, according to the embodiment of the present invention, since the excitation light source 71 of the light source element is a light-emitting diode or a laser diode, the excitation light irradiation device 70 of the light source device can emit high-intensity light.

Further, according to the embodiment of the present invention, the projector 10 includes the excitation light irradiation device 70 of the light source device; the display element 51 forms an optical image by light emitted from the light source device; and the projection side optical system 220 is The optical image formed by the display element 51 is projected onto the screen; and the control unit 38 is a projector control means for controlling the light source device and the display element 51; therefore, a projector having the above-described effects can be provided.

Further, according to the embodiment of the present invention, since the lens array 73 is used instead of the plurality of collimator lenses, the manufacturing cost of the excitation light irradiation device 70 can be reduced.

Further, according to the embodiment of the present invention, it is not necessary to perform position adjustment of a plurality of collimator lenses, and the excitation light irradiation device 70 can be reduced by using the lens array 73 which is formed at a predetermined position with high precision by using a plurality of lens portions 73e. Manufacturing costs and shortened manufacturing time.

The present invention can easily produce additional advantages and modifications in these fields. The scope of the present invention is to be construed as being limited by the scope of the appended claims.

10‧‧‧Projector

11‧‧‧Top panel

12‧‧‧Front panel

15‧‧‧left panel

17‧‧‧ venting holes

18‧‧‧ suction holes

19‧‧‧Lens cover

21‧‧‧Output connector unit

22‧‧‧Output interface

23‧‧‧Image Transformation Department

24‧‧‧ display encoder

25‧‧‧Video RAM

26‧‧‧Display driver

31‧‧‧Image Compression and Decompression Department

32‧‧‧ memory card

35‧‧‧Ir receiving department

36‧‧‧Ir Processing Department

37‧‧‧Key/indicator section

38‧‧‧Control Department

41‧‧‧Light source control circuit

43‧‧‧Cooling fan drive control circuit

45‧‧‧ lens motor

47‧‧‧Sound Processing Department

48‧‧‧ Horn

51‧‧‧Display components

60‧‧‧Light source unit

70‧‧‧Excitation light irradiation device

71‧‧‧Excitation source

73‧‧‧ lens array

235‧‧‧ movable lens group

SB‧‧‧ system bus

The detailed description of the embodiments of the invention, and the claims

Fig. 1 is a perspective view showing the appearance of a projector according to an embodiment of the present invention.

Fig. 2 is a view showing a functional circuit block of a projector according to an embodiment of the present invention.

Fig. 3 is a plan schematic view showing the internal structure of a projector according to an embodiment of the present invention.

Fig. 4 is a perspective view showing a light source device according to an embodiment of the present invention.

Fig. 5 is an exploded perspective view showing a light source device according to an embodiment of the present invention.

Fig. 6 is a front elevational view showing a light source device according to an embodiment of the present invention.

Fig. 7 is an explanatory view showing an arrangement area of screws in the light source device according to the embodiment of the present invention.

Fig. 8 is a perspective view showing a lens array of a light source device according to an embodiment of the present invention.

Fig. 9 is a cross-sectional view taken along line I-I of the position of the light source element in the light source device shown in Fig. 6.

Fig. 10 is a partially enlarged view showing a cross section taken along line II-II of the screw position in the light source device shown in Fig. 6.

Fig. 11A is a front schematic view showing a light source device according to a first modification of the embodiment of the present invention.

11B is a light source device according to a second modification of the embodiment of the present invention. Set the front mode map.

70‧‧‧Excitation light irradiation device

71‧‧‧Excitation source

73‧‧‧ lens array

73e‧‧‧Lens Department

79‧‧‧Array holder

79a‧‧‧Light through hole

79b‧‧‧Installation recess

80‧‧‧Light source holder

80a‧‧‧ plate-like body

80b‧‧‧Protruding

81‧‧‧heatsink

82‧‧‧ lens fixing screws

83‧‧‧Solar fixing screws

87‧‧‧ Fixture fixing screws

89‧‧‧ pressure plate

89a‧‧‧ lens hole

89b‧‧‧Clamp hole for fixing screws

89c‧‧‧Lens hole for lens fixing screws

89f‧‧‧ plate body

Claims (10)

A light source device comprising a light source holder in which a plurality of light source elements are arranged in an array at a predetermined interval; and a lens array having: (a) a plate-like base; (b) Each of the plurality of lens portions is arranged in an array at a predetermined interval and formed integrally with the plate-like base portion, and is disposed on the light-irradiating side of the light source element; the array holder is Disposed between the light source holder and the lens array, and holding the lens array; and a pressure plate disposed on the light irradiation side of the lens array; the lens array having the first fixing screw member inserted in the plate base portion a plurality of first hole portions; the array holding system has a first screw hole portion to which the first fixing screw member is engaged at a position corresponding to the first hole portion of the lens array; and the first fixing screw The member penetrates the first hole portion of the lens array and is engaged with the first screw hole portion of the array holder, so that the lens array and the array holder are disposed in close contact with each other; the platen has a plate shape a plurality of light-irradiating hole portions formed at a position corresponding to the plurality of lens portions of the lens array; and the second hole portion through which the main portion of the first fixing screw member penetrates and has a diameter ratio The head of the first fixing screw member is smaller; the first fixing screw member penetrates the second hole portion of the pressure plate And the first hole portion of the lens array is engaged with the first screw hole portion of the array holder, the pressure plate and the lens array are disposed in close contact with each other; and the first fixing screw member of the lens array The opening diameter of the front side of the plurality of inserted first hole portions is formed to be larger than the diameter of the second hole portion of the pressure plate to which the first fixing screw member is inserted; and the head of the first fixing screw member is used The peripheral portion of the second hole portion of the pressure plate is pressed to the array holding body side, and the peripheral portion of the second hole portion of the pressure plate is bent, whereby the lens is pressed by the plate-shaped main body portion of the pressure plate The plate-like base of the array. The light source device of claim 1, wherein the flat surface on the rear side of the plate-like base of the lens array and the flat surface on the front side of the array holder are disposed in close contact with each other. The light source device according to claim 1, wherein the plurality of first hole portions into which the first fixing screw member of the lens array is inserted are formed such that an opening diameter on the front side is larger than an opening diameter on the rear side, and is inclined The face is formed on the inner side surface of the first hole portion. The light source device of claim 1, wherein the lens array has a third hole portion into which the second fixing screw member is inserted; and the array holding system is at a position corresponding to the third hole portion of the lens array. a fourth hole portion into which the main body portion of the second fixing screw member is inserted; the light source holding system having a second screw hole portion into which the second fixing screw member is inserted; The main body portion of the second fixing screw member penetrates the fourth hole portion of the array holding body and engages with the second screw hole portion of the light source holder, whereby the light source holder and the array holder are disposed Densely connected. The light source device according to claim 1, wherein the plurality of first fixing screw members are disposed in the vicinity of the center portion and the vicinity of the corner portion in a plane of the plate-like base portion of the lens array. The second hole portion of the pressure plate into which the first fixing screw member is inserted, the first hole portion of the lens array, and the first screw hole portion of the array holder. The light source device of claim 4, wherein the locking force of the array holder and the light source holder by the second fixing screw member is maintained by the lens array and the array by the first fixing screw member The body has a stronger locking force. The light source device of claim 1, wherein the array maintains a member formed of a material having high thermal conductivity. A light source device according to claim 1, wherein the light source holding system has a heat sink that abuts against the light source holding body on a surface facing the surface on which the light source element is held. The light source device of claim 1, wherein the light source component is a light emitting diode or a laser diode. A projector comprising: a light source device; a display element that forms an optical image by light emitted by the light source device; and a projection side optical system that projects an optical image formed by the display element to Screen; and projector control The light source device and the display device are controlled by the light source device according to any one of claims 1 to 9.